Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781723455742
Category :
Languages : en
Pages : 24
Book Description
A pitch active control system (PACS) was developed and flight tested on a wide body jet transport (L-1011) with a flying horizontal stabilizer. Two dual channel digital computers and the associated software provide command signals to a dual channel series servo which controls the stabilizer power actuators. Input sensor signals to the computer are pitch rate, column trim position, and dynamic pressure. Control laws are given for the PACS and the system architecture is defined. Discussions are given regarding piloted flight simulation and vehicle system simulation and vehicle system simulation tests that are performed to verify control laws and system operation prior to installation on the aircraft. Modifications to the basic aircraft included installation of the PACS, addition of a c.g. management system to provide a c.g. range from 25 to 39% mac, and downrigging of the geared elevator to provide the required nose down control authority for aft c.g. flight test conditions. Three pilots used the Cooper-Harper Rating Scale to judge flying qualities of the aircraft with PACS on and off. The handling qualities with the c.g. at 39% mac (41% stability margin) and PACS operating were judged to be as good as the handling qualities with the c.g. at 25% mac (+15% stability margin) and PACS off. Guinn, W. A. Unspecified Center NASA-CR-166009, NAS 1.26:166009, LR-30208-1 NAS1-15326
Development and Flight Evaluation of an Augmented Stability Active Controls Concept
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781723455742
Category :
Languages : en
Pages : 24
Book Description
A pitch active control system (PACS) was developed and flight tested on a wide body jet transport (L-1011) with a flying horizontal stabilizer. Two dual channel digital computers and the associated software provide command signals to a dual channel series servo which controls the stabilizer power actuators. Input sensor signals to the computer are pitch rate, column trim position, and dynamic pressure. Control laws are given for the PACS and the system architecture is defined. Discussions are given regarding piloted flight simulation and vehicle system simulation and vehicle system simulation tests that are performed to verify control laws and system operation prior to installation on the aircraft. Modifications to the basic aircraft included installation of the PACS, addition of a c.g. management system to provide a c.g. range from 25 to 39% mac, and downrigging of the geared elevator to provide the required nose down control authority for aft c.g. flight test conditions. Three pilots used the Cooper-Harper Rating Scale to judge flying qualities of the aircraft with PACS on and off. The handling qualities with the c.g. at 39% mac (41% stability margin) and PACS operating were judged to be as good as the handling qualities with the c.g. at 25% mac (+15% stability margin) and PACS off. Guinn, W. A. Unspecified Center NASA-CR-166009, NAS 1.26:166009, LR-30208-1 NAS1-15326
Publisher: Createspace Independent Publishing Platform
ISBN: 9781723455742
Category :
Languages : en
Pages : 24
Book Description
A pitch active control system (PACS) was developed and flight tested on a wide body jet transport (L-1011) with a flying horizontal stabilizer. Two dual channel digital computers and the associated software provide command signals to a dual channel series servo which controls the stabilizer power actuators. Input sensor signals to the computer are pitch rate, column trim position, and dynamic pressure. Control laws are given for the PACS and the system architecture is defined. Discussions are given regarding piloted flight simulation and vehicle system simulation and vehicle system simulation tests that are performed to verify control laws and system operation prior to installation on the aircraft. Modifications to the basic aircraft included installation of the PACS, addition of a c.g. management system to provide a c.g. range from 25 to 39% mac, and downrigging of the geared elevator to provide the required nose down control authority for aft c.g. flight test conditions. Three pilots used the Cooper-Harper Rating Scale to judge flying qualities of the aircraft with PACS on and off. The handling qualities with the c.g. at 39% mac (41% stability margin) and PACS operating were judged to be as good as the handling qualities with the c.g. at 25% mac (+15% stability margin) and PACS off. Guinn, W. A. Unspecified Center NASA-CR-166009, NAS 1.26:166009, LR-30208-1 NAS1-15326
Development and Flight Evaluation of an Augmented Stability Active Controls Concept with a Small Tail
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 118
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 118
Book Description
Accelerated Development and Flight Evaluation of Active Controls Concepts for Subsonic Transport Aircraft. Volume 2: AFT C.G. Simulation and Analysis
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 100
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 100
Book Description
Accelerated Development and Flight Evaluation of Active Controls Concepts for Subsonic Transport Aircraft
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 72
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 72
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1346
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1346
Book Description
NASA Reference Publication
Author:
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 770
Book Description
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 770
Book Description
Monthly Catalogue, United States Public Documents
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1196
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1196
Book Description
Monthly Catalog of United States Government Publications
Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages :
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages :
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Active Control Systems--review, Evaluation and Projections
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Flight Mechanics Panel. Symposium
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 422
Book Description
The papers considered comprehensive range of topics including: Active Control Technology applications; optimisation of systems architecture for both reliability and cost; control low design, development and test; the application of handling qualities criteria and the operational demonstration ofsystem reliability.
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 422
Book Description
The papers considered comprehensive range of topics including: Active Control Technology applications; optimisation of systems architecture for both reliability and cost; control low design, development and test; the application of handling qualities criteria and the operational demonstration ofsystem reliability.
Development of an Advanced Pitch Active Control System and a Reduced Area Horizontal Tail for a Wide-body Jet Aircraft
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 74
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 74
Book Description